Independent generators for congruence subgroups of Hecke groups

DOI10.1007/BF02572632zbMath0845.11017OpenAlexW2032476609MaRDI QIDQ1909565

Chong-Hai Lim, Mong-Lung Lang, Ser-Peow Tan

Publication date: 11 September 1996

Published in: Mathematische Zeitschrift (Search for Journal in Brave)

Full work available at URL: https://eudml.org/doc/174827

zbMATH Keywords

free productsfundamental polygonsindependent generatorsFarey symbolscongruence subgroups of Hecke groups

Mathematics Subject Classification ID

Unimodular groups, congruence subgroups (group-theoretic aspects) (20H05) Structure of modular groups and generalizations; arithmetic groups (11F06) Free products of groups, free products with amalgamation, Higman-Neumann-Neumann extensions, and generalizations (20E06)

Related Items (8)

On Rademacher's conjecture: congruence subgroups of genus zero of the modular group. ⋮ Arithmetic and geometry of the Hecke groups ⋮ Wohlfahrt's theorem for the Hecke group \(G_5\) ⋮ Principal congruence subgroups of the Hecke groups ⋮ CONVEX STANDARD FUNDAMENTAL DOMAIN FOR SUBGROUPS OF HECKE GROUPS ⋮ Principal congruence subgroups of the Hecke groups and related results ⋮ The structure of the normalisers of the congruence subgroups of the Hecke groupG₅ ⋮ Normalisers of subgroups of the modular group

Cites Work

• Unnamed Item
• Über die Heckeschen Gruppen \(G(\lambda)\). II
• An Arithmetic-Geometric Method in the Study of the Subgroups of the Modular Group
• SPECIAL POLYGONS FOR SUBGROUPS OF THE MODULAR GROUP AND APPLICATIONS

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